From CanadaLands
It’s called EdgeWalk and it’s opening August 2011. For CAD $175, you strap on a harness, step out on the edge at the top of Toronto’s CN Tower, and walk around the 360° Restaurant on the edge — literally hanging off that strap, which you hope will hold your weight. If you slip, that strap will be your only life line preventing you from free falling 356m (1,168 feet) to the ground below.
Interested? Read more about the EdgeWalk.